Externally mounted shield for LED luminaire

Patent metadata

Field	Value
Publication number	US-9400087-B2
Application number	US-201414206424-A
Country	US
Kind code	B2
Filing date	Mar 12, 2014
Priority date	Mar 12, 2013
Publication date	Jul 26, 2016
Grant date	Jul 26, 2016

Abstract

A shield for a light emitting diode (LED) luminaire includes a frame mountable to the LED luminaire such that the shield is removable therefrom. A plurality of rows of shield surfaces contact the frame and have a first side that faces a row of LEDs located on the LED luminaire and an opposite second side. The first side has a fully or partially reflective surface. The plurality of rows of shield surfaces prevent light from the LEDs from reflecting toward the back of the LED luminaire. The shield may include notches for allowing removal of one or more of the plurality of rows of shield surfaces or a portion thereof from the frame and for customization of light distribution from the LED luminaire. The shield may also be cut lengthwise such that each of the plurality of rows of shield surfaces includes a partial shield surface and shields only a portion of a row of LEDs located on the LED luminaire.

First claim

That which is claimed is:

1. A shield for a light emitting diode (LED) luminaire having a plurality of rows of LEDs that emit light, the shield having a top and a bottom and comprising:
a frame having opposing side edges separated by a distance, a first end, and a second end opposite the first end, wherein the frame is mountable to the LED luminaire such that the shield is removable from the LED luminaire;
a plurality of elongated shield members, wherein each of the plurality of elongated shield members:
extends the distance between the opposing side edges of the frame;
comprises a first side and a second side, wherein the first side comprises a reflective surface and faces the first end of the frame and wherein the second side faces the second end of the frame;
is configured to extend parallel and adjacent to one of the plurality of rows of LEDs located on the LED luminaire; and
in cross section, comprises an arm including a first generally planar portion that extends upward from the plurality of rows of LEDs and a second portion which at least partially covers over and curves away from the one of the plurality of rows of LEDs so that the elongated shield member blocks light emitted by the one of the plurality of rows of LEDs toward the second end of the frame and so that the first side of the elongated shield member reflects the blocked light toward the first end of the frame; and

a plurality of elongated openings extending entirely through the shield from the top to the bottom of the shield, each elongated opening extending the distance between the opposing side edges of the frame and adjacent to at least one of the plurality of elongated shield members, wherein at least one of the plurality of rows of LEDs resides in one of the plurality of elongated openings such that light emitted by the at least one of the plurality of rows of LEDs passes through the one of the plurality of elongated openings in which it resides.

2. The shield of claim 1 , wherein the second side of each of the plurality of elongated shield members comprises a diffuse or nonreflective surface.

3. The shield of claim 1 , wherein the second side of each of the plurality of elongated shield members comprises a reflective surface.

4. The shield of claim 1 , wherein the reflective surface on the first side is coated onto the first side or is integrally formed in the first side.

5. The shield of claim 1 , wherein the frame further comprises a plurality of notches for allowing removal of one or more of the plurality of elongated shield members or a portion thereof from the frame.

6. The shield of claim 1 , wherein the plurality of rows of LEDs are located on the LED luminaire on a surface, the surface comprises a perimeter, and the frame of the shield extends around the entire perimeter of the surface such that the light emitted by each of the plurality of rows of LEDs engages one of the plurality of elongated shield members.

7. The shield of claim 1 , wherein the plurality of rows of LEDs are located on the LED luminaire on a surface, the surface comprises a perimeter, and the frame of the shield extends around only a portion of the perimeter of the surface such that the light emitted by only some of the plurality of rows of LEDs engages one of the plurality of elongated shield members.

8. The shield of claim 1 , wherein each elongated shield member comprises a length and wherein each elongated shield member comprises a constant cross sectional shape extending along the length.

9. A light emitting diode (LED) luminaire having a front and a rear, the LED luminaire comprising:
a plurality of rows of LEDs located on a surface of the LED luminaire, wherein each LED emits light and is covered by an optic and wherein the surface comprises a perimeter;
a shield comprising a top and a bottom and removably attached to the LED luminaire, the shield comprising:
a frame having opposing side edges separated by a distance, a first end, and a second end opposite the first end;
a plurality of elongated shield members, wherein each of the plurality of elongated shield members:
extends the distance between the opposing side edges of the frame;
comprises a first side and a second side, wherein the first side comprises a reflective surface and faces the front of the LED luminaire and wherein the second side faces the rear of the LED luminaire;
extends parallel and adjacent to one of the plurality of rows of LEDs located on the LED luminaire; and
in cross section, comprises an arm including a first generally planar portion that extends upward from the plurality of rows of LEDs and a second portion which at least partially covers over and curves away from the one of the plurality of rows of LEDs so that the elongated shield member blocks light emitted by the one of the plurality of rows of LEDs toward the rear of the LED luminaire and so that the first side of the elongated shield member reflects the blocked light toward the front of the LED luminaire; and

a plurality of elongated openings extending entirely through the shield from the top to the bottom of the shield, each elongated opening extending the distance between the opposing side edges of the frame and adjacent to at least one of the plurality of elongated shield members, wherein at least one of the plurality of rows of LEDs resides in one of the plurality of elongated openings such that light emitted by the at least one of the plurality of rows of LEDs passes through the one of the plurality of elongated openings in which it resides.

10. The LED luminaire of claim 9 , wherein the second side of each of the plurality of elongated shield members has a diffuse or nonreflective surface.

11. The LED luminaire of claim 9 , wherein the second side of each of the plurality of elongated shield members has a fully or partially reflective surface.

12. The LED luminaire of claim 9 , wherein the reflective surface on the first side is coated onto the first side or is integrally formed in the first side.

13. The shield of claim 9 , wherein each elongated shield member comprises a length and wherein each elongated shield member comprises a constant cross sectional shape extending along the length.

14. The shield of claim 9 , wherein the frame of the shield extends around the entire perimeter of the surface such that the light emitted by each LED within each of the plurality of rows of LEDs engages an elongated shield member.

15. The shield of claim 9 , wherein the frame of the shield extends around only a portion of the perimeter of the surface such that the light emitted by only some of the plurality of rows of LEDs engages an elongated shield member.

16. A light emitting diode luminaire having a front and a rear and comprising:
a plurality of rows of LEDs located on a surface of the LED luminaire, wherein each LED emits light and is covered by an optic and wherein the surface comprises a perimeter;
a shield comprising a top and a bottom and removably attached to the LED luminaire, the shield comprising:
a frame having a side edge:
a plurality of shield members extending from the side edge of the frame, wherein each of the plurality of shield members:
comprises a first side and a second side, wherein the first side comprises a reflective surface and faces the front of the LED luminaire and wherein the second side faces the rear of the LED luminaire;
extends parallel and adjacent to one of the plurality of rows of LEDs located on the LED luminaire; and
in cross section, comprises an arm including a first generally planar portion that extends upward from the plurality of rows of LEDs and a

Assignees

• Abl Ip Holding Llc

Inventors

• Marquardt Craig Eugene
• Collins Patrick A
• Chen Jie

Classifications

• F21V11/16 Primary

  using sheets without apertures, e.g. fixed · CPC title

• F21V7/0066

  specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified (F21V7/16 - F21V7/30 take precedence) · CPC title

• F21V7/0083 Primary

  Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane (combination of two or more reflectors F21V7/0025) · CPC title

• F21S8/086

  with lighting device attached sideways of the standard, e.g. for roads and highways · CPC title

• F21K9/52

  Mechanical Engineering · mapped topic